The ratio \(R_{d}^{\left(\Psi ^{\pm }_{l}\right)}\left(\theta ; E_{o}\right)\)  for \(E_{o} = (12.5~\mbox{keV})/(511~\mbox{keV}) =0.0245\)  has been calculated and is shown in Fig. REF (a). The thickness of the curve gives an estimate of the theoretical precision. The ratios \(R_{nd}^{\left(\Psi ^{\pm }_{l}\right)}\)  and \(R_{nd}^{\left(\Phi ^{\pm }_{l}\right)}\)  have also been calculated for the case when \(E_{os} = 1.2E_{o}\)  (i.e., \(E_{os} = 15\)  keV) and \(E_{oi} = 0.8E_{o}\)  (i.e., \(E_{oi} = 10\)  keV), and are shown in Fig. REF (b). As can be seen, both Fig. REF (a) and REF (b) show a significant asymmetry in the coincidence counting rates at \(\theta \approx 89.98\)  degrees, where the degenerate and non-degenerate ratios reach a peak value of \(1713.04\)  and \(1650.26\) , respectively. These peak values are approximately 600 times larger compared to the value of 2.85 predicted for 511 keV cross-polarized Bell states [1]}, [2]}.
